USN-769-1: libwmf vulnerability

Ubuntu Security Notice USN-769-1

4th May, 2009

libwmf vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software description

  • libwmf


Tavis Ormandy discovered that libwmf incorrectly used memory after it had
been freed when using its embedded GD library. If a user or automated
system were tricked into opening a crafted WMF file, an attacker could
cause a denial of service or execute arbitrary code with privileges of the
user invoking the program.

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 9.04:
Ubuntu 8.10:
Ubuntu 8.04 LTS:
Ubuntu 6.06 LTS:

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.